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'''Mechanical obstruction'''<br>  
 
'''Mechanical obstruction'''<br>  
An obstruction of the colon or rectum will cause faecal material to become impacted and dry. The obstruction may be intraluminal such as a foreign body, polyp, mass or stricture. Extraluminal obstruction can be due to a mass, abscess, and prostatic diseases such as prostatic cyst, mass and prostamegaly.  
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An obstruction of the colon or rectum will cause faecal material to become impacted and dry. The obstruction may be intraluminal such as a foreign body, polyp, mass or stricture. Extraluminal obstruction can be due to a mass, abscess, and prostatic diseases such as prostatic cyst, mass and [[Prostatic Enlargement|prostamegaly]]. A diverticulum to the colon or rectum, or a perineal hernia interupts the normal passage of faeces and may result in an impaction.  
    
'''Colonic weakness'''<br>
 
'''Colonic weakness'''<br>
A systemic disease causing abnormalities in electrolytes, such as [[Hypercalcaemia - Small Animal|hypercalcaemia]], hypokalemia can affect peristaltic contractions; the endocrine disorder [[Hypothyroidism|hypothyroidism]] also results in colonic weakness.
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A systemic disease causing abnormalities in electrolytes, such as [[Hypercalcaemia - Small Animal|hypercalcaemia]], hypokalemia can affect peristaltic contractions; the endocrine disorder [[Hypothyroidism|hypothyroidism]] also results in colonic weakness. Idiopathic [[Megacolon|megacolon]] is a significant cause of impaction especially in cats. 
 
   
 
   
 
'''Problems with defecation'''<br>
 
'''Problems with defecation'''<br>
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[[Category:Intestine_-_Mechanical_Obstruction]][[Category:Dog]][[Category:Cat]]
 
[[Category:Intestine_-_Mechanical_Obstruction]][[Category:Dog]][[Category:Cat]]
 
[[Category:To_Do_-_lizzyk]]
 
[[Category:To_Do_-_lizzyk]]
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[[Category:To_Do_-_Review]]
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